分类统计字符个数count_char

要求程序接受用户输入一行字符（字符个数不得超过80个，该字符串以回车符结束）按字母 数字和其他字符分类计数，然后将结果分三行分别显示出来，并标明哪类字符！

-Categories Statistics count_char number of characters to accept user input requirements of the procedure and his characters (the number of characters shall not be more than 80, the string to the end of carriage return) by alpha-numeric and other characters count, and then three lines, respectively, the results show and indicate the type of character!